Note 11 - Right-of-use Assets - Operating Lease Liability (Details) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Operating lease liabilities	$ 127,615
Initial recognition of operating lease liabilities		81,856
Capitalization of operating lease right-of-use assets		125,474
Payments on operating lease liabilities	(16,187)	(79,715)
Operating lease liabilities	111,428	127,615
Less: current portion	(22,898)	(25,715)
Operating lease liabilities - non current portion (Note 11)	$ 88,530	$ 101,900